TEU vs FEU: Meaning, Capacity and Container Examples

Quick overview

TEU means twenty-foot equivalent unit. It is a standard way to express container capacity using a 20-foot container as the reference. FEU means forty-foot equivalent unit. In a basic container count, one 20-foot container equals 1 TEU, while one 40-foot container equals 2 TEU or 1 FEU. TEU and FEU describe equivalent container lengths; they do not state how much cargo a particular box can safely hold.

TEU vs FEU at a glance

Two 20-foot containers and one 40-foot container both represent 2 TEU, but they are not the same physical shipment. They involve different numbers of containers, and their usable space, payload and handling requirements must be checked separately. A 40ft High Cube is taller than a standard 40ft container, yet both count as 2 TEU in this basic length-based comparison.

For actual equipment specifications, use the 20ft container guide, 40ft container guide and 40ft High Cube guide.

How do you calculate TEU for a group of containers?

For a shipment containing standard 20ft and 40ft containers:

TEU = number of 20ft containers + (number of 40ft containers × 2)

Illustrative example: a shipment has two 20ft containers and three 40ft containers.

• Two 20ft containers: 2 TEU
• Three 40ft containers: 6 TEU
• Total: 8 TEU across five physical containers

This is a container-equivalent calculation. It does not mean the shipment contains eight containers.

What does a ship’s TEU capacity mean?

A vessel described as having a capacity of 10,000 TEU has a nominal container capacity expressed in 20-foot equivalents. It does not necessarily carry 10,000 separate 20-foot boxes on every voyage. The actual mix may include 20ft, 40ft and other equipment, subject to vessel layout, weight, operational limits and the cargo being carried.

Ports also report container traffic in TEU to provide a common measure for containers of different lengths. A TEU figure is not a count of individual boxes. The reporting method matters too: the World Bank’s port-traffic definition includes empty units and can count transshipment cargo when it is unloaded and loaded again at an intermediate port. The Port of Los Angeles container statistics are a US example of reporting in TEU.

Does 2 TEU mean twice the cargo or twice the price?

No. TEU compares container length for capacity reporting. It is not a cubic-meter or weight unit. The permitted payload, internal dimensions and door opening depend on the actual container and equipment specification. Likewise, a quote for a 40ft container is not automatically twice the price of a 20ft quote. Compare the rates and applicable charges for the same route and service scope.

If you are planning a shipment, start with the ocean freight calculator and provide the container type and number of containers, rather than only a TEU total.

Where did the TEU idea come from?

Standardized containers made it possible to move cargo between ships and other transport without handling every individual package at each transfer. A key early milestone was the Ideal-X voyage from New Jersey to Texas in 1956, carrying 58 containers. As container formats became standardized, a 20-foot equivalent became a useful shared measure for comparing vessel capacity and port activity. The World Shipping Council’s history covers the voyage, while ISO 668 describes the classification and dimensions of Series 1 freight containers.